docs: record fail-closed accuracy challenger

docs/AI_PIPELINES.md

@@ -421,9 +421,10 @@ false positives block default promotion.
 The focused small-building local model asset,
 `geointel-building-yolov8s-smallbld-minpx3-img640-ft30-pt`, is the current
 recommended Detection Lab operator profile. Use tile size `512`, overlap `64`
-and confidence threshold `0.15`. Persisted QA/QC at match IoU `0.25` across
-seven positive AOIs measured mean precision `0.5898`, recall `0.5770` and F1
-`0.5825`; minimum per-AOI F1 was `0.5528`. The strict three-sample pure-empty
+and confidence threshold `0.15`. Its original promotion evidence at match IoU
+`0.25` across seven positive AOIs measured mean precision `0.5898`, recall
+`0.5770` and F1 `0.5825`; minimum per-AOI F1 was `0.5528`. The strict
+three-sample pure-empty
 background gate produced zero detections. Compared with the previous balanced
 profile, the same persisted reference populations contain 1,571 fewer false
 negatives, including 745 fewer misses in the 25-100 m2 bucket and 181 fewer
@@ -443,6 +444,24 @@ produced zero detections in the pure-empty Postel forest control. The active
 confidence therefore remains `0.15`. This result does not claim production
 perfection and does not justify another model-training run by itself.
 
+A coverage-aligned July 2026 rerun supersedes the older displayed profile
+averages above without changing the active model or threshold. On the exact
+current pipeline, the seven independent Mol/Kempen zones measured mean
+precision `0.6141`, recall `0.6062` and F1 `0.6069`; the minimum zone F1 was
+`0.4749` in Mol Postel. The active model again produced zero detections in
+Postel-bos, Lommel-heide and Arendonk-heide. These are the values shown in the
+Detection Lab operator profile.
+
+The reviewed-accuracy experiment added six training-only AOIs from Arendonk,
+Dessel, Meerhout, Laakdal, Nijlen and Hulshout. The paged GRB export contained
+9,964 complete reference features. Its audited `512`-tile corpus retained 252
+tiles and 79,192 labels with no invalid or missing labels. The inactive
+`geointel-building-yolov8s-reviewedexp6-minpx3-img640-ft20-pt` challenger
+improved mean seven-zone F1 to `0.6248`, but produced two detections in the
+explicitly empty Postel-bos control. The formal fail-closed promotion report
+therefore retained the current active model. Positive-score gains never
+override a failed pure-empty background gate.
+
 False-positive and false-negative evidence from persisted detection QA can be
 classified through `detection_reviews`. The queue derives from quality-check
 evidence ids and resolves persisted Detection and reference VectorFeature rows.